I think RJ is an cult, not a person. PJ is an especialist in liars, and he had belived in the guy that he have murdered, thinking that he was Red Jhon.
And in the last episode, the farmer speaks of demonical rituals at the barn where was found the two bodies (fact that sugest more than one murderer). And the barn is the first place where appears the RJ symbol. I think that is where the cult has started.
We've already seen Red John. It's the "FBI" guy who was on the few episodes when Jane helped Lorelei escape. He's the man who went with Lisbon to interview Lorelei s mother. Remember when the FBI woman was on the phone with the man in the limo?? She said "it's done". You see him briefly in the limo. That's who it is! He also shook Janes hand in the cbi
So I've been thinking about something that the illusion of Patrick Jane's daughter brought up in the episode where he gets drugged and hallucinates.
The Illusion says something in the likes of "do anybody know who you are?" while they're stomach pumping him. He nods and answers "yes".
We haven't had any more information about this particular moment or what it means.
Theorizing that Grace Van Pelt is a member of Visualize based on how she defended their philosophy in "The Red Barn". Red hair, Visualize member, her cousin's a "psychic", engaged to known Red John accomplice, joined CBI same time as Patrick... she is not Red John but it will pan out that she is involved, even if not directly (e.g. Red John's daughter).
Ray Haffner
His first episode..... "The Little RED Book"
His most recent episode...... "The RED Barn".... lots of clues revealed this episode.
RJ always seems to know PJ's plans after he shares his idea with Lisbon. Lisbon could be RJ, but more likely she shares the info with Haffner, who then is able to stay one step ahead.
He was/is a member of Visualize. He couldn't/wouldn't confirm or deny being at the farm back at the time frame of the two murders (two murders if you believe the vet's daughter's story).
Can't see many (which I find quite surprising) pointing to this:
Patrick Jane's dad - Alex.
1) They had a falling out approx. mid 80s (not long before the killings started) where PJ ran off with a fellow carnival worker (his now dead wife). We've barely seen Patrick's past relationship with his father since then, so there's no reason why there can't have been reasons why him running off with her might have caused even more issues (maybe it was the final nail in the coffin of the father/son working relationship).
What we do know for fact is that their relationship broke down because Alex cared little about the people they were hoaxing, and PJ did (more so) which ruined some of their work.
2) Alex realised PJ was the better psychic but as mentioned, they fell out about ethics more than anything. Cue years later when PJ is then suddenly making himself famous and a decent living doing exactly what his dad wanted him to do all along.
3) Alex would fit the right age group, will have no doubt shaken hands in the past, and would explain (whoever it was that said it) saying Red John and Patrick Jane are very similar. Almost every clue we have can be seen in Alex.
4) There's no real 'down side' to the story in terms of feeling like "oh man I liked them" or "what about that episode when happened?" - and it isn't 'obvious' like some of the other top suspects are which I doubt the writers would go for.
We also have a lot of scope in which to further develop the relationship without giving too much away about how it might be his dad.
Thoughts!?
Teresa is a friend of Red John.
Patrick Jane is known for his baits. Let's look at this episode's bait.
Patrick hides his room from Teresa. In the end of the episode, she gets so curious that she gets in.
I recalled all the names of the 2164 people that I met and shook hands with since Red John murdered my family.
What the hell? Of course he doesnt remember this many names.
Teresa asks for names, and PJ says there are some interesting ones.
Teresa says tell me.
http://s14.postimage.org/myqsiksj5/tellme.jpg
Look at Teresa's face. Does she look like a person who wants her friend to catch the murderer of his family? Not at all. She looks uncomfortable, very very uncomfortable.
http://s7.postimage.org/4kyenwtjf/image.jpg
And at that moment, look at Patrick's eyes and face. He has this sad face, sad to see the truth. He is reading Teresa with his eyes, and sad with the result.
The last scene is very weird. This scene is shot like this on purpose.